A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
ABBA regulates plasma-membrane and actin dynamics to promote radial glia extension
Tekijät: Saarikangas J, Hakanen J, Mattila PK, Grumet M, Salminen M, Lappalainen P
Kustantaja: COMPANY OF BIOLOGISTS LTD
Julkaisuvuosi: 2008
Journal: Journal of Cell Science
Tietokannassa oleva lehden nimi: JOURNAL OF CELL SCIENCE
Lehden akronyymi: J CELL SCI
Vuosikerta: 121
Numero: 9
Aloitussivu: 1444
Lopetussivu: 1454
Sivujen määrä: 11
ISSN: 0021-9533
DOI: https://doi.org/10.1242/jcs.027466
Tiivistelmä
Radial glia play key roles in neuronal migration, axon guidance, and neurogenesis during development of the central nervous system. However, the molecular mechanisms regulating growth and morphology of these extended cells are unknown. We show that ABBA, a novel member of the IRSp53-MIM protein family, is enriched in different types of radial glia. ABBA binds ATP-actin monomers with high affinity and deforms PtdIns(4,5)P2-rich membranes in vitro through its WH2 and IM domains, respectively. In radial-glia-like C6-R cells, ABBA localises to the interface between the actin cytoskeleton and plasma membrane, and its depletion by RNAi led to defects in lamellipodial dynamics and process extension. Together, this study identifies ABBA as a novel regulator of actin and plasma membrane dynamics in radial glial cells, and provides evidence that membrane binding and deformation activity is critical for the cellular functions of IRSp53-MIM-ABBA family proteins.
Radial glia play key roles in neuronal migration, axon guidance, and neurogenesis during development of the central nervous system. However, the molecular mechanisms regulating growth and morphology of these extended cells are unknown. We show that ABBA, a novel member of the IRSp53-MIM protein family, is enriched in different types of radial glia. ABBA binds ATP-actin monomers with high affinity and deforms PtdIns(4,5)P2-rich membranes in vitro through its WH2 and IM domains, respectively. In radial-glia-like C6-R cells, ABBA localises to the interface between the actin cytoskeleton and plasma membrane, and its depletion by RNAi led to defects in lamellipodial dynamics and process extension. Together, this study identifies ABBA as a novel regulator of actin and plasma membrane dynamics in radial glial cells, and provides evidence that membrane binding and deformation activity is critical for the cellular functions of IRSp53-MIM-ABBA family proteins.
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